The value I was able to add to this deal, was mortgaging the property to provide all of the cash to the seller.

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? 

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. 

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. 

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

In that case the extra cost of a home warranty is worthwhile to provide security in case of a significant issue.

Yes, you can occupy one half of the duplex after a 1031 and still get the tax deferral - provided that the investment half of duplex by itself is worth at least as much as the land you sold AND all of the proceeds from your land sale are designated for down payment on the investment half only.  3.

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

Of course, this assumes you're keeping track of everything religiously, as it would be hard to reconcile such records and ensure completeness.Otherwise, look into hiring a bookkeeper/accountant/CPA who can provide this as a service for you and can help advise you proactively, so you can prevent issues rather than remedying them after the fact.

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