Downmarket is simply going for equal services perhaps from either less conventionally popular SPs or less spectacular surroundings. MySweetMilf is an example of this. Less than $200/hr for an experienced and usually somewhat attractive milf. They may be women ranging from 30's to 50 and may be quite skilled or still quite attractive, but not necessarily agerncy material. MP providers that offer full services may be another example of this.
Less explored local options are available, but there are caveats and disclaimers that go with some of them. In some cases they may be things that you learn abroad that can be imported here. So, here's a few. Cuddle sites. CuddleUp was the big one but I think it shut down now. There are others. The cuddlers are often flexible with their services, develop their services with you personally, or straight up offer sex. I have maintained probably a half dozen ongoing connections through such sites, two of which I still see. Half the price of an SP or less, but watch out as the sites are infested with Nigerian scammers looking for gift card payments. Any place, especially chinese places, that offer both esthetics and massage is a potential downmarket location. They often don't advertise in English sites and are often undiscovered outside of chinese communities, but are happy to take in new clients. Language may be an issue. I haven't gone through the trouble of tracking any down here in Montreal, but I had 3-4 I went to in Vancouver. Ethnic classifieds, either sites or bulletin boards. Again the target audience is often unassimilated immigrants or visitors looking for either documented or undocumented work. You can either look for ads or place ads/flyers phrasing it as you like, but usually looking for body rub etc. You can do it in English but it helps if you also use the target language. I use Spanish. Sites like Locanto sometimes have hidden gems, but a filter is needed. Strangely enough, people who go to places to spend less money are often looking to make money too. Flea market boards etc. Place an ad directly yourself, again usually if in ethnic areas with a high percentage of immigrants. Instead of looking for ads in Kijiji ,A123 etc put one up as "looking for" and ask for what you like. Create a disposable email and profile though. You will get responses. You can also do this in schools and career colleges. but you have to be circumspect and most schools require that your ad be approved for either virtual or physical posting or they remove it, so it may not last long. Any filipina job search network sites or community centres. Very hungry for work and if you are diplomatic in your phrasing you will get responses and discussions, and some will bite. There are others, but you get the idea. I have at one time or another used all of these methods and have obtained positive results, but not all in Montreal. Most of them though.
OK, so here's the caveats. First off, it's a numbers game. You have to be prepared to get no result or little result or slow results with ad type searches. Over time you will acquire enough people that you can eliminate all of the legwork. It's not for quick hits though, except for the cuddle and estehtics places. There is actually some work and time that needs to be invested. Second, a lot of these things are geared towards maintaining an ongoing understanding with the girls in question. In other words, it usually only is worth doing if you live in the targeted area, so no good for visitors without a lot of work. Location may be an issue for some mongers, so plan accordingly depending on your method/taret audience. Get a monger phone. You will go crazy if you use your regular phone for this and there are occasionally some weirdos. lol. Lastly you need to be basically honest. You don't need to say everything up front, but you do need to explain clearly what you want once you engage directly with someone. If you lie to them it will reflect very badly on you and it can cause you serious problems too. Don't try to do all of this stuff at once. Looking at salons and such can be targets of opportunity when you're around them. Likewise an ad here or there. looking at sites is easy, of course. If you're not in hurry and just do stuff as time and circumstances permit then over time you will develop cheap, pleasant and familiar relationships of convenience. Look at it as amateur SA or Sugar Daddy stuff for some of the options. Not everything will work for everybody and not everybody will want to invest the time or see it as too much hassle, which of course it is. The upside is that once the time is invested and the hassle has been suffered there's very little to do and you can reap the rewards on an ongoing basis for a long time with very little maintenance.
TLDR, use your imagination and look for people who are looking for you but don't know how to find you.