I agree about having a stronger pump. I took a 7 gallon bucket, mounted a 100 psi Shurflo bypass in the bottom of it, wired it up and plumbed it to a bulkhead fitting with a nipple and strainer in the bottom of a 5 gallon bucket. Set the 5 gallon bucket inside the 7 and used 3 stainless nuts and bolts with silicone to secure the two buckets together. Set the bucket sprayer in place, plug it in, run 50 ft or even 75 ft of hose and I'm set. Total cost around 150.00 and with a #5 or 6 jet, it is much faster than a multisprayer.
I can't figure why they keep putting 60 psi pumps in these sprayers, unless they are for protector.