This is snowy joke people.
If you can straighten a bent wheel, you can probably build a wheel from scratch. The first half, the lacing, is just about following instructions really. The second half, the tensioning and truing, is more involved and has more potential to go wrong but it’s not actually all that hard, especially with new rims and good quality parts.
Realistically the worst that can happen is you screw it up and end up getting a shop to un**** it for you. Which is no worse than just getting them to do it in teh first place. You have to really seriously screw up to damage a spoke or rim.
If you were just thinking of lacing but not tensioning, some shops aren’t delighted to have a pre-laced rim brought to them just for tensioning. Others don’t mind. I’d check first.