From there, you can do more due diligence by talking with surrounding mobile home dealerships and park managers or owners to get an idea of the market values of these homes which depends on factors such as size, age, location, fix-up work, etc.

It depends on how the current deal is performing.

I did a quick review of Furnished Finer in Midvale, UT and it looks like your price estimate is about in line with the market but there is of course a bit of range depending on exact location/level of furnishing, amenities, etc.

So I think it depends on the strength of your deal.  

It’s going to be highly dependent on your situation, assets, etc.

It all depends upon the total cost of construction, based on that your monthly fixed cost/mortgage will come into picture.You cannot rent too far from market rate, essentially you should have some spread between mortgage(construction cost) and rent to cover for cashflow, vacancy etc.I would suggest you to keep the selling it out as your second exit strategy if renting is your first one. in that case your construction cost + selling cost cannot be more than market price of new construction.You can also try to reach out to developers to give them a piece of the pie but then you will have to sell for sure.

You might need less money upfront and could score better returns.

then... it will all depend on immigration.i just read that South Korea's birth rate has fallen below 1! 

Typical rates are 8-12% of income either monthly or yearly depending on manager.

Define lowball.If it's a $380k house, I'll throw a $325k out there depending on where I'm at.