With about $15,000 you could put down 3.5% on a deal like mine but in my particular situation I know my seller won’t pay 100% of closing costs because it’s an off market deal and a good price already.

This will confirm what the lease terms and actual rents the tenants are paying. 

I do not plan on paying for the service that she signed up for but also not clearly sure how I can help.

After that, they have to pay rent, utilities, and other costs even if they aren't going to occupy for another month.

You can ask seller to pay closing costs to help reduce costs. 

Issue is he is paying 750$ a month for the 3br/1ba unit, market value for the area for the same type of unit is $1,819.  

Once you find a house that you believe would be a good rental, meaning desirable to your target market of customers (people within a couple of mile radius of the place), and all of the costs of monthly ownership that you can accurately project fall below the rental amounts that you project that you can get from your target customers, then you have a possible business asset that you can use to produce income, and have renters pay down the mortgage, while hopefully it goes up in value at least with the rest of the economy. 

Often, these insurance companies are able to pay a higher rate and desire a nice property to ensure they keep their customer happy as they go through an extensive claim.

I would like to see about putting a tiny home on the 2 acre property and selling it to pay off the mortgage on my main property.

Essentially paying down my principle puts more equity in my pocket for when I want to tap into this resource.