If you're going for a traditional mortgage, challenging the appraisal with updated comps might work.

Look for markets with diverse job opportunities, population growth, and a strong local economy.Financing: Explore your financing options, such as traditional mortgages, home equity loans, or investment property loans.

Yet those are the cities that are going to make you rich, and pretty quickly. 

It's for a buyer who can't qualify for a traditional mortgage.

You're stacking risk factors - long distance (I think), first time STR investor, short on cash, partner to buy the land, lack of financing options due to land and non-traditional structures, and a little distress/hurry.

Read Poor Dad Rich Dad by Robert Kiyosaki. 

I know some software will do it for you but that is for more traditional lenders.

They promise you’ll ‘get rich quick’Real estate investing and wealth building is a very long-term game that comes with a lot of risk and often requires a significant financial investment.

However, it's important to remember this trend started in the not too distant past, and for a very long time before that the norm was separate rooms, so it's not surprising that there are actually considerable disadvantages of open floorplans and advantages of more traditional ones.Opening the kitchen to the rest of the house has to be one of the worst aspects of this trend.

The Rich own nothing, but control everything.