I have fimco so I'm going to bash myself - I hate anything fimco. Every product I've ever used that they make (unfortunately I have 3 of their sprayers and a spreader) is junk IMO. Falls apart- it's the "budget" cheap crap the big stores can sell the cheapest. Every product they make reminds me of the McDonalds happy meal toys made in China that break after 5 minutes. I have them and I don't use them except for one I totally refabricated at a welding shop by the best welder and machine maker I know. He laughed how bad it was. Sorry on rant- just really bad and wasted a lot of time on that garbage over the years.
If it were me- I'd buy a good quality used sprayer that's built a lot more solid. I have a Hardi 1000 gallon but of course that's not needed. They make amazing stuff along with most other companies like sprayer specialities. I know companies like SS make utv sprayers. I strongly prefer tractor sprayers for millions of reasons (one example of many: u cannot run any "thick" or sticky herbicide such as atrazine thru electric motor sprayers). But-utv, I'd start with SS & also stop by Deere dealer cause one by me is carrying a new line that looks good from what I saw. Strongly against fimco unless u get it for free or find one in the bottom of ur happy meal.