I rented out the additional bedrooms to friends and family, charging them well below market, and sold when it was time for my wife and I to start our own adventures.

You’d probably end up with a bigger after tax gain if you sold the 2nd property for any amount of money and did that.

No one can answer that because we don't know what market you are in and what your list price is versus the actual value, as well as the scale of the town.When something hasn't sold in 50 days, it's overpriced.

Recently decided, to invest in a mobile home park but sold at a loss.

I suggest your next lease have such a clause and that you make sure you can find the lease (but i have also somehow lost a lease recently).For where you are now, without a signed copy of lease i believe your options are limited.  

@Shakthi Kamal read copy and paste advice below.For cashflow, you'll be looking at mostly Class C properties/tenants.Be SURE you UNDERSTAND what this means or your expectations won't match reality!

We accomplished that within a few months, and five years later we were doing well over $100 million per month before we sold the company.To get there, we hired top originators from our competitors. 

I have a copy of the IRS Cost Segregation Audit Technique Guide (Publication 5653) if you want one. 

Also CC a copy to the tenant for their records.

I rented out the additional bedrooms to friends and family, charging them well below market, and sold when it was time for my wife and I to start our own adventures.