I don't have a 100% bulletproof answer for you because these numbers are subjective and vary based on factors, like; Location, Market, Investment Strategy, etc...

Buy/hold strategy.

Is there any specific strategies you are interested in using? 

This is the most basic level of protection and it is not very effective, but it is still better than nothing.

If you were to go get a full-time (40 hours per week) W2 job tomorrow, you could effectively immediately use that income to qualify.

For rental complexes, this means creating outdoor spaces that are not only beautiful but also eco-friendly and cost-effective to maintain.

I suggest re-evaluating your rental strategy. 

However you do have the opportunity to look at a 1031 exchange which would indefinitely defer all of the tax on that $240K gain.Selling one larger property to use the proceeds to purchase several smaller properties is a classic 1031 strategy called a diversification exchange. 

The most common strategy here would be to do:1.

Some options here - What is the rental strategy - is it leased or vacant?