It sounds like you're already going in the right direction by working a stable job and improving your credit.

You would buy the home with 10% using hard money, improve it and refinance the existing lien using the new appraised value( will the lender allows using the new value on a R/T refi without a waiting period).  

They also weren't the best to communicate with but this was during quarantine so maybe its improved. 

We are planning to put $300k in improvements.

We had some narrow lots and the older homes were the only ones that would fit on those, with the local setback rules.Echoing what others say, most municipalities aren't excited about a MHP in their town because a MHP is not considered "improved" land, and therefore is not taxed at the "improved" rate.

Improved property and moved to new location.

Capital Improvements upon closing What was the outcome?

Purchase price: $165,000 Cash invested: $40,000 Sale price: $273,000 Purchased off-market property and completed a renovation to include the following: minor structural repairs, minor changes to floor plan, complete interior painting and floor refinishing, gut and redo kitchen, various landscaping improvements, deck repairs, all new hardware and light fixtures.

If the difference is more, you need to find the receipts for all the improvements you did on the property to reduce the amount of actual gain as much as possible. 

If the investor had to sell right away for $240k, with closing costs and commissions, they would most likely lose money.The other key point is without any improvements, the new appraisal will be $205k, the price you sold it to an investor for, not the $240 comps in the area.Wholesaling works best if you can find an off market fixer and the rehab the investor puts in forces a significant improvement in value.