This kind of idea is something i have heard of before for ppl to all visit at once...I think its a great idea but there a few things that make me think I'm not sure if I would do it myself.

Are you planning on breastfeeding? Newborns can often take an hour to breastfeed, will you feel comfortable o do this in front of everyone while you and bubs are learning or would you leave everyone? If you will leave everyone are you happy to do so? (this is an issue you will have with visitors anyway but sometimees you can try to work it around when you think you will be feeding and gett the ppl to come once they will have fed.

Food- big preperation, I personally think its a bit too much on new parents so I would suggest either getting close family and friends to handle all the food and drinks or make it everyone bring a plate type of thing.

House - Will the ppl you invite help clean up? Or will they leave the house a mess and leave you exhausted? If you think the house will get trashed maybe think about a location. park etc etc, however, that means you will have to get out of the house and be away from home for howver many hrs so preperation that way

Anyway I think it sounds great but just thought I would throw in a couple of things I would consider