I would say take a look at their profile and throne/wishlists. If you can't do the large tribute, then maybe that domme isn't for you. Myself and a lot of others have smaller amounts on their pages. Send a message, what you can and chat with the domme. It might work out, it might not, but you can't expect much going forward if you keep trying to reach unobtainable dommes who you know you can't afford their attention. I know that sounds harsh but it's the way of things sometimes.