@Kris TohovitisI wouldn't recommend using your cash to pay off the mortgage on your primary residence since you can likely get a better return on that money by investing it.What's your buying criteria for the multi-family property?

In other words, all the other MTR hosts are dealing with the same expense.To control this expense, I always recommend an utility cap where tenants are charged for any usage over an established dollar amount.  

Do anyone have recommendations?

I'll take any and all advice any of you have, but the two things I'm looking for specifically are: what sites, services, and/or software you use and recommend for sceening and managing tenants? 

Careful going outside state lines -- contract for deed is not allowed in Texas.I didn't think COD is illegal in Texas, just perhaps not recommended anymore, because it is difficult to comply with the rules or regulations. 

Did you work with any real estate professionals (agents, lenders, etc.) that you'd recommend to others?

I can definitely provide a recommendation.

Anyone you recommend in Minnesota?

I'm a little biased (am the owner) but seriously pumped to see you recommending it.

Florida is a unique state for MHP law and the insurance has gotten very expensive there too.I recommend checking out @Frank Rolfe's mobile home university content if you haven't already.