As a trans person on a limited budget, I feel your pain. Paying for meds is rough and expensive. I agree your spouse is being a bit unreasonable buying so many new clothes and gold adidas.

The electrolysis I understand, as I assume your spouse is amab, and hair removal like that is often necessary to be comfortable.

The best thing I think you can do right now is sit down and talk about finances. Tell them to slow down. Understand they've probably struggled with their gender affirmation for awhile, and it can be a bit of a high to get what you've been wanting for so long. (I know, I've done the exact same thing). But that it needs to be brought under control.

I often get my clothes from thrift stores, or on massive clearance. My hormones are from a discount pharmacy that helps low-income trans people.

Let your partner know that you worry about the finances. Let them know you support their transition, but that things are tight and you may need to find ways to save money.

See if there are any clinics in your area that help low income trans folk. There are a lot of resources out there. I'm sure your spouse would be find with looking into them!

If not, if your spouse refuses to look at things from your perspective, or does not see your needs as important, remember that sometimes a relationship could require professional intervention. A counselor is an excellent third party who could look at both sides of the story objectively and unbiased.

Seeing as I don't really know your spouse or how they feel, everything I've said here is just some general advice. Hopefully it was some help though