If you're paying that much I'm sure there are plenty of pros here who'd take the gig and work with you to get that last 20% sorted out how you like.
Just save the project using Per Project folders and send that via a file sharing site like Dropbox. I would recommend Danny Danzi. He's got his own way of doing things but he's also the type of dude who'd want things to be how you want. He'd probably also teach you how to get your projects to 90% or more on your own for the next time.
And it's not just him. There are plenty of other great Sonar based producers around here (or ones who at least have it installed on one of their systems). Just go through the Songs forum and you'll hear some REALLY amazing stuff.
Maybe post a thread stating you are looking for a pro in the Techniques or Songs forum areas of the site (saying that you'll pay). Ask for some examples of mixes and provide an example/details of your songs and how you want them to sound, budget, etc. I'm sure you'll find a good match.
I've been involved in two full on, brick and mortar studio albums WAY before I got into recording myself (and various pre prod demos). Even though my bandmates and I had some level of input on the mix I don't like the sound of either (and now that I know more myself can hear EXACTLY what went wrong/what I would have done differently).
Restricting yourself to local setups when there is a whole world of engineers out there just limits your options.
That said, maybe microapp's friend is the answer. It is certainly nice to be able to plop yourself right in the room with the dial twister so you can listen as things happen.
Cheers.