Buying $2.5m rev (private payer) in-home care provider (C-Corp)

Dear all, as a self-funded (SBA) searcher, I am looking at a C-Corp structured $2.5m topline (private payer only) in-home care provider (activities of daily living) that serves a wealthy clientele.. If you have purchased or studied such a business and have suggestions for key lines of inquiry or the below I would welcome it.

I'm currently assessing:

1. How stabilized G&A should look and where its 33% EBITDA margins should stabilize (run out of founder's home; founder ran it solo until a year ago when his sister took on scheduling yet he claims he is working onlyredactedhrs/wk). I see 10-20% EBITDA margins on home healthcare firms (that staff nurses & take insurance by contrast). 2. Optimal composition of admin / leadership team and how to transition when all back office / leadership departs with owner. 3. Whether office space adds value. 4. Ways in which people have improved these businesses with tech or management technique. 5. Incremental costs & complexities to buying a C-Corp (taxed as S-Corp).
6. Regulatory risks I may not grasp as an industry outsider.

Thanks so much!