about opening a store possibly? Something small, a place to showcase your installs and sell some equipment to those who just want to purchase.
You could even have non-standard hours, but be open on the weekends and during the week by appointment. Get a couple of tvs in the window that show pictures of installs and instruct on the type of work you do for when you aren't in the store to make sure you get the customer to come back on the weekend.

Owning your own business is the best thing in life.

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B7 A4 2.0T w APR Tuned K04 - Gone

Now sporting 05 A8L
20x9 Sportec Wheels
Vag-Com and Mechanical Lowering
35% Tint