In "Buehler's Backyard Boatbuilding", George shows how to convert tiller to wheel steering without breaking the bank, and even keeping the tiller. (He also has lots of other DIY stuff you might find interesting/useful. )
From his website
Buehler's Backyard Boatbuilding
Starting with tools: "... the true craftsman is a rare bird; no more in tune with the Cosmos than you, just more patient..." to instructions for the proper use of alcohol at the launch, this book guides you step by step through the process of building a real sea-going cruising boat. Written from the novel point of view of keeping costs down and having fun, this is, if you'll pardon me, the BEST "how-to" book since "Volkswagen Repair For The Complete Idiot." There's 160 pages of drawings and photos, and even complete plans ranging from a 28' cutter to a 55' displacement power boat.
Print & mail or fax, or e-mail the following info: Please note; These things are NOT refundable without prior agreement!
Name: __________________________________________________ __________________________
Address: __________________________________________________ _________________________
"BUEHLERíS BACKYARD BOATBUILDING" $25.95______(FREE with all Building Plans. Add $6.00 Priority US postage, $11.00 Canada Air Priority, $13.00 western Europe air, and $22.00 elsewhere. If "elsewhere" is less than $22 we'll refund the difference. For example, Italy is $11 for Global Priority, but Slovenia next door doesn't accept US Global so postage there is $22)
George Buehler Yacht Design
P.O. Box 966,
Freeland, WA 98249
Telephone & fax (360) 331-5866