Yes it is. And I remain embarrassed and guilty for succumbing to the temptation and buying a Lift3. But with daily sessions and finally getting it into some surf, less so every day ... it is a really fun addition to the toybox, it will open up self tow-in possibilities that would otherwise stay dream land only.
I had intended to DIY one, but turning 54 I had an attack of feeling the clock ticking, decided I didn't want to wait a year to figure it out, then another year or two of futzing with break downs and gear I can't fully trust. Carpe diem. I still intend to DIY one, then sell my Lift, or best case, if I can entice my wife onto it, his n hers adventure toys.
DIY potential for savings depends in part on your skills and what you already have on hand.
- If you already have a foil set up, then you save $2500ish off the top.
- If you already have a board you can modify, then that saves you another $2000. Or if you can build a board, that's $500-800 in materials cost.
- The hardware costs roughly $1500: motor, ESC, water pump, antenna, remote
- A full size battery costs $4-5k. The cells, BMS, etc probably run $2k or so, that's just parts.
- Folding prop is $1300 (mandatory for wave riding!), there are now knock offs for $500, and there are files to 3d print one for free, if plastic will suffice.
- You can do without the fancy bags, there's $500 saved.
So that's how it adds up to $13k and how you can save 50% or more doing it DIY. You lose some of the savings if you have to buy tools: 3d printer, soldering, welder, shaping tool, etc, but you can charge that against your buddy when you build his/hers next.
In terms of comparisons, I tell people "it's motorcycle money". But maybe a better comparison is ebike. You can get a china knockoff ebike for $1000. Or you can get best in show for $10k+. Same deal here. The no-namer efoils are down to $4k....but I would feel pretty uncomfortable on that 1km offshore in the shipping lanes chasing wakes. It helps to think of this as a motorized vehicle, not a fancy surfboard -- and I've long ago learned the hard lessons about "getting what you pay for" when you buy cars or boats. Cheaping out vs making the painful investment upfront ends up costing you the same in the end ... just with so much more misery, heartbreak, and stress along the way.
My 2 cents, from foil addict world.