We always are looking for more help answering questions here in the forums, so anytime you can jump in and offer advice, we'd love it!

Alternatively, there are a few sites out there that can give you an estimate - but what I've found is that these have been highly unreliable (even Propstream). 

Most large PE MHP investors will tell you to only offer on the pad rental portion of the income which assuming $500 each, 25% expenses and an 8% CAP your at $281250.The other way is to offer her the wholesale value of the five mobile homes. 

Also i suspect there is not as much offered here over existing options as some believe.  

(a) Any person offering to redeem must pay to the then holder of the legal title the value of all permanent improvements made on the land since the sale, and if the holder of the legal title cannot be ascertained, payment may be made to the circuit court of the county having jurisdiction of the subject matter when the complaint is filed to redeem.

Buyers are offering way lower prices than actual, and  sellers are accepting.

@David De La TorreTransitioning from single-family properties to larger multi-family properties can increase cash flow, diversify, and offer economies of scale.

Not every lender offers it, but you can do an investment property reno loan and roll the renovation costs into the mortgage.

As a new real estate investor this is simply too large a project for me to try and tackle, but I know this forum is full of quality investors who care about their tenants and are always looking for a deal!

That bank/lender who holds the Heloc will reduce your credit limit and close the account until paid and scores improve.Cash out refinance is tax free, allows you to have higher liquid reserves, PITI reserves for multiple investment rentals, be cash strong for earnest or for a quick "All Cash offer".