When it comes to practical motors for your TI, you have to first make the choice between gas-powered and electric.
Gas-powered motors, such as the
Suzuki 2.5HP are much less expensive and provide a lot of power. However, they're heavy, require gasoline on board, are
much noisier, and are a bit smokey. They're harder to start and control and have no practical reverse. They also require more maintance.
A proper electric motor such as the new 3HP
Torqeedo 1103AC is quiet, lightweight, powerful, very easy to control remotely, has a reverse, requires no dangerous fuel, and is non-polluting. But they cost considerably more than gas outboards. However, you can save a lot if you can find a used one. I know of one for sale.
I own both and will always recommend electric over gas if you can afford it.
I've covered all of this in detail in these two posts:
Torqeedo 403 Ultralight Motor / Hobie TI Application GuideOutboard Motor / Hobie TI Application Guide & 403 ComparisonI highly recommend reading both before making any decision.
If you have any questions, please let me know and I'll be glad to help.