Dolly should be a Junior at least.
Somewhere between mid-30s and early 50s. Also, part of the joke of her handing out those business cards is that she's desperate for work. So no, she's not comfortable thanks to Ephraim's money. I hadn't seen the show for so long, and just went to see a youth theatre production (because my brother was playing Barnaby) and was reminded what a lovely show it is...it makes me so happy!