@Matthew Adams
Matthew, first an accredited investor has specific requirements but one is that you have $1,000,000 in net worth without considering your residence. Second is you have a high income of $?
May I say that you have been lucky in your first RE investment but to continue your success you need to become more educated in the tools of RE investing. Please take this as positive advice not as criticism.
The 1031 Exchange is the number one tool of RE investing. Study the rules. The IRS allows you to exchange an investment property to another investment and delay paying federal tax on capital gains and depreciation recapture. These are carried into the new properties. You need to invest an amount of $ equal or greater that the sale of the property you are exchanging in the purchase of new property or properties. You also need to have the sum of new mortgages equal or greater that the mortgage you may have had on the property you sold. The most complicated part is the sale and purchase through a third party called a QI, qualified Intermediary. @Dave Foster can explain all the ins and outs if interested..
My suggestion of using the 1031 exchange in your case is generally based on what is know as the 1% rule. Meaning if you find a property that has a rent ratio (monthly rent/cost of property) of 1% or better you can be resonably assured that it will have positive cash flow. POSITIVE CASH FLOW is the #1 goal of a RE Investor. You have + cash flow currently and that is great but as you property appreciated I am sure you are well below the 1% ratio. If you sell and re-invest in several lower cost properties which have higher rent ratios, you cash flow from them will increase from the current $400 /mo. You delay the Cap Gain Tax and invest it for your benefit. Once each of your new rentals increase in value, repeat the process.
Just my humble opinion. Cheers, Buddy