As a guest, I’d probably be a bit surprised but would likely enjoy it if done right. However, hosting 15 people in your own home is quite a big task. To make them comfortable, you’d need enough plates, cutlery, seating, table space, toilets, even a big enough bin to put the (unecological) wrapping from 15 takeaway meals etc. will they be driving - have you enough car parking? Somewhere to put their coats?
All in all, I think for your own home on your own wedding day, it would be a stressful nightmare. If I were hosting 15 people at home tomorrow evening, I’d probably spend a good chunk of the afternoon getting the place ready, setting out tables, making sure there was enough toilet paper and clean towels in the bathroom etc. if it’s your own home, you will be spending the day getting ready for your own wedding. And then you’ll have to make sure you have tidied away any bits and pieces from getting ready before heading off to the ceremony. If someone spills their curry, do you really want to be running around with a mop on your wedding day? When they leave to go home, you’ll be left with a mess to tidy up. Basically I think hosting in your own home takes up far more time and effort than you are accounting for and would be a bit of a shame to spend your wedding day dashing about. If you really want a homely ambiance, is there someone else’s house (a parent/sibling/close friend?) who could do the hosting for you?
If you have the option of a church hall, I’d definitely choose that instead.
Best wishes