I thought there was a law that required for me to get a copy of it and also of my credit report that they were using as the basis for the loan.

You've probably heard of big Landlords losing property, but only because they were flagrantly violating Fair Housing, running a slum, or otherwise violating the law in an egregious manner.

As far as the legality of sober living homes they have a good bit of protection at the federal level from local government discrimination since people in recovery from addiction are a protected class, however some cities and counties have occupancy laws and certain codes that conflict with the sober home model and oftentimes the neighbors are not keen on having one next to them.

Closing Attorneys/law firms are another good resource for this. 

Examples of pitfalls include purchasing in an undesirable area, not understanding the market values (vs. list prices), not knowing the rental values (current and market), inheriting bad tenants, buying a lemon, going rogue on renting and management with no contacts / systems / no legal understanding of PA and Municipal landlord-tenant laws, not having trusted resources and contractors in place, using out of state lenders or shaky financing, throwing lipstick on a pig when renovating a house and wondering why it's ARV isn't increasing, tenants are renting, etc.

Talk to the current owner to see how long the leases have been in place and the look up local laws to see what happens when the original lease ends (typically 1 year) and what happens if no end date is stated.

At least within this question let's exclude the US market, taxes and laws since I am far from investing on that market.

If you're not comfortable with the eviction process, hire an attorney.https://guides.sll.texas.gov/landlord-tenant-law/eviction-pr... 

Make sure to check zoning laws and permit requirements in your area, and maybe connect with local contractors through referrals to get multiple quotes.

It is very difficult to manage when you are not local, don't know the laws, have the infrastructure, and can't react quickly when necessary.