I think you need a bit more of a plan. It seems that you've been throwing money at your investments and throwing it at rental properties because you don't really know what to do with all the extra cash you earn. But those rental properties are not good rental properties -- the first one's not horrible (clearing
@$100/mo, not counting depreciation, on a
@$115K house), but the second one is costing you even more than you're making on the first one! There are many people who have FIRE'd on rental properties, but that only works if they are
good rentals -- i.e., rentals that put cash in your pockets every month. As it is now, you have about $90K of equity locked up in investments that are losing you cash every month (not counting depreciation). If you want to FIRE, you need all of your assets deployed in places that are bringing in money.
On the flip side, if you sell both rental properties, it looks like you'd have about $700K to invest. That would provide about $28K to live off of. If you sell all three properties, that gives you about $800K, or $32K/yr -- but it would also free you of the
@$1800/mo. mortgage (though you'd then have to pay rent somewhere else). Run the numbers for yourself, but it looks like you've got some work to do either way if you want to make it in 2 years (although you could certainly afford to switch to part-time or contract work).
IMO you just need to decide which path you want to follow. If you want to own rental properties, sell the two existing properties, start looking for properties that will generate good cash-flow every month (even after expenses), and do a Starker exchange into those properties. If you don't want to be an active landlord, then sell your existing properties and put your money into VTSAX or something similar.