Easier to ask for forgiveness than permission. Just buy it.
I met my wife a bit over 48-years ago while I was in a nightclub touring ban. She booked our band into the club where she was assistant mgr and we only played there for 1 week instead of our normal 2-week stint. Asked her to come on the road with me at the end of the week and she did. After I stopped touring, still played weekend gigs and used gig money to buy gear as needed although that was really all incidentals as my touring gear was more than enough to play anywhere.
After all my gear was stolen, I started looking for another MIA Jazz Bass. Could not find one I liked. They all had thick or deep necks and I just couldn't be happy with that. I kept looking for a Jazz with the same neck profile, shape and radius that my '65 had (60's slim-C with 7.25" radius). finally found it in 1985 and we had a "discussion" about purchasing it because I hadn't gigged in years and we had 3 young kids. I think my statement that I'd always been able to" make money making music was the phrase that pushed it over the top and I bought my current Jazz.
From there I again only used gig money to buy gear. Had "just barely giggable gear in 2006 but by 2008 had upgraded both amp and cabs to have a reliable set-up. Then in 2010 got a better amp that improved my sound. All with gig money. Sold an old combo in 2015 and that put me over the top to by my "last" cab, a DNS-410 by DNA.
Then moved to Washington state and sure enough bought 3 more cabs (two Eden EX-112's and a DNS-210), one more amp (Eden TN226), and was on the verge of getting another amp (DNA-800) when Covid-19 shut down all my gigs. Still have partial $$ put aside for that "last" amp and once gigs start going again, I'll get it. Not a complaint about buying gear ever from her although I did get "the look" in 1985 when I bought my '82 Jazz.
So, if you can pay for it , or promise to pay for it, from gig money, you can probably save yourself a world of hurt. If you promise to pay for it with gig money, then you are going to have to deliver and that might be tough right now. Personally, if I don't have the $$ from gigs, I don't buy it, and that's fine with me.