Bridesmaid/moh questions

Hello everyone,

First time poster, long time lurker. I've been engaged for a strangely long amount of time so I could finish my PhD, but we're finally getting married next September. I've been thinking about who I would pick as bridesmaids for a long time and I had been planning on using my 2 sisters and my FH's sister. However there is an issue. My FH's sister is still in college and doesn't have a job, so money is incredibly and money has always been tight for her family. Also with COVID, she basically isn't allowed to leave as someone in the home has asthma. I'd still love to have her as a bridesmaid, but I think she wouldn't be able to participate in a lot of the pre-wedding festivities and that she would feel left out. I don't want her to have a negative experience and she's the kind of person that would agree to be a bridesmaid, feel left out and stressed, but she wouldn't want to disappoint anyone. Should I still ask her?

Second question: I don't want to pick between my sisters for MOH so I was thinking of having 2. But if my FH's sister does join in, is it weird/rude to have 2 maids of honor and 1 bridesmaid? It feels kind of exclusionary. I'm really terrible at social situations and drama and with all the family drama that already exists, I just don't want to make it worse. What do you all think?Thanks for all your help!