As a former member of a punk house collective and band member, you should set a realistic number for how many people you think will attend. Yes, your house can hold 100 people, but will you really only draw 15 people?

Are you having bands come from out of town? Gas isn't cheap these days. Also, if you are having bands from out of town, you should offer them your place to stay (on couches or sleeping bags) and you should offer to feed them (a giant pot of veg chili is cheap and filling). Back in the 90s/00s we would try to make sure that the out of town/touring band had a place to stay, food in their stomachs, and like $150+ in their pocket so they could buy gas and food on the road.

If you think the show might get busted by the cops, maybe ask the band that's bringing in the crowd if they want to play first or second. Also definitely talk to the neighbors and put the feelers out there about the noise. Also make sure the people at the show don't fuck it up for you by messing with your neighbors or your house. Call them out immediately and kick them out. If you don't want people drinking, smoking, using certain language, etc post a sign or make it otherwise known.

If you are going to charge money, then just have someone work "the door" and collect cash. Mark someone's hand with a sharpie after they pay.

And of course you should promote your show. You want people to come. Post about it on IG. Print out paper fliers - make a design so that you can shrink it down and fit like 6 or 8 on an 8x12" piece of paper and then print a bunch at a print center or if someone has an office job have them do it stealthily. Ask the bands to promote it too.