My advice is do not let that stop you from refinancing and being able to free up 100% of your entitlement.

I have seen digital solutions for Multi family and residential real estate, but not Commercial General Liability. 

In addition to what @William Simpson posted I would add the following platforms: - Roomies.com - Spareroom.com- Roomster.com Beware, as some of these are not free, but they can greatly complement the free ones already mentioned. 

Come check it out please feel free to contact me if you have any questions.

Another option that can potentially be free is looking for a mentor who is doing what you aspire to do in real estate and see how you can be of value to them so you can learn while helping their business.

Pick places that are similar to what you are looking to buy.You can also head over to https://www.awning.com/airbnb-estimatorIt pulls the same data that AirBNB does and it is free.

All free. 

Feel free to PM or call me if I can help

If you have free time, being a gopher for an experienced real estate investor (running permits, pickups, etc.) can be a great way in.

As I have been reading a lot of terrible experiences and stories about landlords getting burned due to tenants simply taking their softness for granted and especially taking advantage of a lot of elderly homeowners to live in the places for free and in some cases even filing lawsuits against landlords to simply make money out of them.