Hey Stephanie,
I think the first step is to talk to your lender to see what the qualifying standards are for an FHA loan for a non primary property purchase. Once you know the down payment and expected closing costs you can work backwards to see the amount of property you can afford.
Condos are a nice place to get your feet wet in REI since a lot of the big expenses that you may incur are wrapped up in the HOA fee you pay every month vs Multifamily were you need real reserves and you are liable for all repairs.
Also, you need to address possible restrictions in these 55+ communities in regards to purchasing and renting. We purchased an asset in one of those communities and it is strictly a cashflow play, don’t expect appreciation in these communities.
Some questions to consider:
Have you thought about house hacking a condo? You can purchase it as a primary Residence with as low as 3.5%(FHA) down and then rent it after the first year.
Another thing to note is the Private mortgage insurance or Mortgage insurance premium the bank will charge you with any purchase with any purchase above 80% LTV. Sometimes these premiums can stay on for 10 years affecting your cash flow and wishing you put the 20% down to begin with.
Keep saving, prepare and you will do well in REI :)