Is there a catch? Oxford Crest Over 55's Unit

Does anyone have any info on the Oxford Crest group that manage over 55’s complexes in QLD? I have had my offer accepted for a unit (87k) but no contracts have been signed just as yet.

From what I can see so far (haven’t gone through fine print with solicitor/conveyancer) everything looks promising.
One bedroom unit with long term tenant
Sales price – $87,000
Rent – $250/week
Clears $2700-$3500/ year (body corporate could be reduced fairly drastically). This includes interest and all known expenses. Again, will have to go over fine print.

I’m aware it is a niche market but I’m looking to hold onto the unit mainly as a cash flow source to allow me to move onto other properties. I can only assume these types of developments will increase in demand because of the baby boomers coming into retirement.

Just want to make sure I’m not missing any major problems that others may have experienced with this type of investment.

Thanks in advance!