I have tried a couple handhelds. They are complete garbage, not designed to go through ANYTHING with any real thickness to it (zippers, canvas, double layers of canvas, leather, etc.).
I bought a Singer 4423 off of amazon based off of others reviews doing marine canvas. It worked very well for my needs. I was surprised how well it even went through the ~1/8" thick leather pieces I added for abrasion resistance. I would suggest buying a BUNCH of extra needles, an extra bobbin case (or 2)... But with that I was able to make an entire mesh enclosure for my sundeck as well as new covers for the cockpit area (original intent)... LOL... I am DEFINITELY not any sort of seamstress, but for the cost of the Singer and the materials and what I was able to produce, I am quite happy!!! The mesh enclosure for all materials (including the Keder rail inserts) was less than ~$200.
The mesh enclosure had a couple of extra benefits I hadn't thought about:
1. kept the direct sun out of my face while I was working (I have my "remote" work office setup on the sundeck) original intent of the mesh!
but it also...
2. kept the morning dew off of everything, didn't need to cover all my electronics every night.
3. all but eliminated the wind blast while we are moving.
4. No salt spray either.
5. kept our bedroom (aft cabin) considerably cooler during the day.
6. Bug screen, which came in very handy in a couple places up in the San Juans.
https://www.amazon.com/gp/product/B003VWXZQ0/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1