Grooms-women, everything you need to consider

Hi all! What are all the things we need to think about when having grooms-women? I will have 5 bridesmaids and my fiancé will have a best man and just decided on 3 grooms-women which are his sister’s. My bridesmaids will be wearing shades of mint and have soft light pink floral bouquets. I prefer that he has his grooms-women wear similar style dress as my bridesmaids but in navy or grey and that they have a corsage instead of bouquet. But I know it doesn’t stop there. What about hair and makeup, I am pretty sure my FH won’t think it’s necessary but is that bad etiquette ? And if we do hair and makeup, then we will have to hire another makeup artist since the person I picked can only do the amount I initially told her which are my bridesmaids. We also have to think about getting ready in the rooms, i’d really prefer to have just my bridesmaids with me because I’ll feel the most comfortable on my day because they have always been my cheerleaders and I can’t say the same for all 3 of the sisters (things are getting better now but it’s hard to forget how you were treated in the past) . I don’t think it should be up to me to pay for his grooms-women, maybe just letting him handle everything will take the pressure of off me. So if he doesn’t go for it the problem solved but if does go for it then they’d get ready somewhere else, and is that bad etiquette? Anything else we need to think about besides outfit, hair and makeup? I also think it now makes sense to do co-Ed wedding shower which I am all for. I’d still like to keep my bachelorette just my bridesmaids at this moment in time.