First,and before anything else, you must decide are you wanting to run a business or a side gig that provides a few homes to vacation to. 

We use everything we can do to provide more exposure and potentially find a quality tenant, including MLS.

Many lenders typically require a minimum loan amount of $75,000, allowing you to access up to 75-80% of the property's value, provided that the DSCR ratios meet the lender's requirements. 

So far I have found 2 firms that provide such a service, 1) KBKG and 2) TitanEcho.

You'd probably want to search locally for this - if in West Virginia, first search would be local banks/credit unions or SBA loan providers

Hi AllWe are selling our gas station/property and provided the buyer with the past 3 years business tax returns and are doing an inspection, but I received an email form the buyer saying their banker is asking for my Schedule E, why would they need my Schedule E for the loan? 

If it was shark money, you will see lenders charging ridiculous fees, and providing unreasonable terms.

Additionally, if flood risk is a concern, prioritize areas with lower risk profiles. 

Since then the company which provided the solo 401k was acquired, rules changed so that now (in 2023) what companies offer this option?

AirDNA can provide some insights on data in the market you're planning to work in.