@Emily Lopez
My sister and BIL had moved a manufactured home onto some land and did what you mentioned, renting out the mobile home and now selling it with half of the land. It has worked well for their specific situation and has been comfortable for them, but most of the value has come from the land appreciation. So it "CAN" be a way to start, and could certainly make you money down the road; but it likely wouldn't bring you any "return" or decrease your living cost significantly.
But I would say that regardless of what advice you get here, you need to balance that with what is best for you and your kids. We could tell you to buy a house or a duplex, rent out bedrooms/units, and get started that way; but if that is not something you and your kids would be comfortable with; I think your idea of land and a mobile home is an affordable way to get started.
As far as moving forward, I would really start to network, go to meet-up's, educate, and really dial in what your goals are.
-Are you wanting to quit nursing altogether and willing to be active in another form of income? (Wholesale/flip/Agent,AirBNB/Co-Host/Arbitrage)
- Are you just wanting to invest what you can, grow steadily and have something to retire on in 20yr and pass down to your kids? (Single Family/Multi Family rentals/BRRRR/etc..)
- Are you wanting to do something "bigger", replace nursing? (Commercial/Large Multi/Syndication/etc...)