There are couple of BOS outboard types who ski on Shuswap Lake in B.C. We both have Glastron with open bows; one a 17' and the other a 18'. This lake can get rough in a hurry and yet I have never had waves over the bow because I can adjust the trim and there is enough free board. These are great for free skiing and you can still run the course at longer lines but lack the DD tracking fins. Excellent to learn on.
Two stoke oil injected Outboards if they have been run at higher rpms ie 4,000-5,000 (they are engineered for this) are long lasting and are relatively easy and inexpensive to maintain. The E-tech series from Evinrude are unbelievable engines. Many of the Coast Guard units around the lower mainland and Vancouver Island have switched from Yamaha 4 stroke to these because of better power and much less ongoing maintenance. Every 50 hours for oil services for the Yamahas.
Good luck on your search.