Instead of evicting them, i was thinking is there some way that I could rent it back to him for very cheap (mainly to cover just the taxes/ insurance) ie 2k a year rather than the going rate of 2k a month for similar properties.

You may need to pay points if you put less than 20% down, but lots of no point options once you get to 20% down as long as you have decent credit scores. 

What documents do they require, what credit scores do they allow, how do they verify previous rental history, etc.?

In California there is $800 franchise tax per LLC per year, which discourages a lot of RE investors from getting an LLC.

Seller financed (probably) won't be reported to the credit bureaus and so won't impact your credit score at all.

Another option is investing in real estate through partnerships or fractional ownership, focusing on properties that yield cash flow or appreciation potential.For long-term growth, consider diversifying into assets such as private equity, tax liens, or even certain types of real estate that offer both capital appreciation and income potential over time.

Next Step: With with sparkies quote, I'd get that quote over to sellers and with an amendment all written up ready for there signing giving me a credit at closing for exactly that amount. 

I can do that for you if you are properly prepared with reserves and credit.

Perform the same task in each app to ensure a fair comparison.Load a property with pictures and details.Market that property.See what your marketing looks like from the public's perspective.Submit a fake application to see how easy the process is.Run a credit/screening report on yourself.Enter a maintenance request, assign a vendor, and attach a fake invoice.Enter charges to the tenant's ledger.Enter recurring charges and automatic late fees.Sign documents electronically.Run owner reports.After testing a few apps, one should clearly stand out.

As more people placed more properties in STR inventory, and as more municipalities taxed and regulated the industry, the profitability of the overall industry has reverted to a much more aligned (lower) risk adjusted return.