I get what you are going for with the sidecar....
Just cruising and looking good.
Me personally?
I have ridden a 150 sidecar rig before & it was a shitbox combo.....dangerously slow.....& the extra strain on an already underpowered motor isn't good for the long term.
(Even with the kit it probably wouldn't be much better.)
An old club mate rode a Rally 200 sidecar rig for a few years & it was actually damn fun.
I used to ride "monkey" in it & we would bomb some of the tight roads around here.
Bob at Moto P in SB had a super clean P200 rig for a few years & it was pretty fun as well.
I guess I am saying I wouldn't do a sidecar with anything less than 200cc's
And someone point me to the alternate reality were Stellas are $8000.00
sheesh...some people...
I say save your rubles for a 200 setup or do it yourself.