That is the car I have now, after spending it all on guns

It's doesn't need to be that expensive to build a PPC revolver. Do as much as you can on your own or with the help of friends.
You might want a gunsmith to fit the new barrel. (...and take out the old one, that's where it usually goes wrong)
A trigger job, drilling and taping a few holes can be done by most people.
The gun above didn't cost much more than a new 686.

The Nill grips cost a bit, but when you think about it, it is one of the cheaper custom jobs you can have on a gun, that actually will improve your shooting.
You can get them in a lot of different sizes so they really fit your hand. Use the measuring on Nill's web site, if you are in between to grip sizes go down in size. You don't want them to big.
The gun feels and handles much better. For me they really improved my prone and weak hand shooting.
That they look good is just a bonus. You can easily spend the same money on grips that only look good.

Here is my new PPC revolver made on a model 66-2 with a Lothar Walther polygon barrel. It's almost finished, but still needs to be milled for moon clips.