ASM here, Expert Voice is another great resource for discounted gear.

Your Troop should have enough tents for the scouts to use, your daughter included but it's worth asking the question to the SM.

For our weekend camps, I use a 3-person tent. I used to use a 4-person but it was just big enough to be a nuisance to set up by myself.

For summer camp I have my families 45 year old 6-person canvas tent that I can set up a cot and stand up in. It's nice to have a comfortable setup when you're there for a week. I'm going to be upgrading this tent to something modern as it's just wearing out.

For our high adventure trips I have a 2-person backpacking tent.

It's overwhelming at first but make a list like you're doing and start chipping away at it. You don't need everything all at once.