I recently ordered an inline child trailer (Weehoo model) which all told adds approximately 130 lbs to the back of my bike, and I myself weigh around 140 lbs.

The bike I own is a Cannondale F400 (2005). I'd post a picture, but I don't have URL privileges yet. I'm pretty sure it's made of some kind of aluminum, but I'm not 100% sure.

I live in a moderately hilly part of the Midwest USA, and so I want to add some oomph to my ride so that I can tackle the inclines better. The typical ride length I expect to do would be 3 to 5 miles.

My question is, which kind of e-bike conversion kit do you recommend? I was personally attracted to the Clean Republic Horizon 350W model front hub kit, due to its ease of installation and reportedly good support. But I'm having second thoughts because 350W might not be powerful enough (?) for the trailer in tow and also concerns about the probably aluminum fork.

Would my situation effectively limit me to a mid-drive solution, or to buying a new bike altogether in every case? I value reliability and ease of installation/maintenance the most, and of course safety.

I appreciate any wisdom and suggestions!