is my math right? Your $2M in real estate is only kicking off 48k/yr, or 2.4%? Why not invest that elsewhere (equities) or REITS?
With all due respect, I disagree with selling the property with the 2.4% return because I was a landlord.
The 2.4% return does not include property appreciation. There are rich folks who own property which has a "negative" cash flow....but their property appreciation makes up for this. i.e. owner of a losing sports team with a negative cash flow. They hit the jackpot when they sell.
They also use the negative cash flow to offset the positive cash from other income resulting in less taxes. If OP's $2M property sells for $4M in 10 years since property value tends to double, then the 2.4% return will be much higher.
I recommend keeping the property and keeping the 2.4% cash flow return. It is similar to owning stock with 2.4% dividends but the equity in the stock may potentially have a high appreciation. However, that is OP's decision. Only OP can assess the potential property appreciation.