TimberRidgeRanch- I'd happily board at your barn!!
Over here, stable floors are concrete- rubber matting is a necessity almost. Even then I use straw to the depth of the pitchfork tines plus banks to ensure my horse is comfrtable, warm and safe.
I have friends who bed down differently and use shavings as a sort of 'icing' for the matting. Not the way I'd go-- but it's their horse so none of my business.
Suggest you don't invite your beloved neighbour to your open day-- she sounds like she would only criticise you infront of potential clients. You don't need the hassle.
Upon thinking this over, I think this gal really desires to be included. Let her know you appreciate everyone's advice as they help you arrive at your decisions. I'll bet she'd jump at the chance to help with "coffee and goodies" which you'll be offering at the open house, right? Making her feel like a valuable ally could work very well in your favor.
I bed my stalls deeply as well. We get ours in bulk, which makes banking edges and keeping plenty of shavings in the stalls a lot more affordable than with bagged shavings. When we used bagged shavings, we were spending $120 a week. Now, we fill out shavings trailer to last us two months and pay $150.
I'm curious about how large your manure pile is. That many bags of shavings each week landing on the pile . . .
We bed per need of horse. We do not have any hock sores or rub marks. Some horses trash the stall and need shavings added daily. Others are so neat with their manure and urine spots, you hardly know they were in over night.
Our mats are not to save bedding but to save the stall floor. If no mats, the urine would sift into the stall base and have to be dug out each day. After picking, I typically leave any wet spots open to dry for the day. If I have time I lime the stalls on the weekdays but for sure on the weekends. We do not use 5 bags per stall and we do not have an odor issue.
We have a 3 large bay compost bins we rotate manure piles over and the 3rd pile is spread on the fields. Very rarely do we have huge piles as the process has us spreading 2 times a year spring and late fall.
When I talk about people with rubber mats and little bedding I am talking about people who don't even put in 1/2 a bag more like 2 shovel full of bedding that's it. And these are stalls where horses are stalled at night no run ins attached.
I'd be quite offended if a friend of mine acted like that. It's your barn, you do things the way you want to. Maybe she thinks she is trying to be nice by offering suggestions. Thank her for offering advice but let her know this is what works for you but you will keep her advice in mind in case if you do decide to switch things up.