With 5.5 you’re going to get roughly 150psi drop per 100 feet of hose with 3/8. See chart below:
I think any of the mainstream machines will do what you need. I’ve got the pressure pro machine and heater and they work fine. Maybe the pump only lasts 1000 or 1500 hours before it needs rebuilding. Who cares, if you threw it away and bought a new one, instead of rebuilding it, it’s like $.50/hour cost. I build in a 500 hour depreciation expense on my major equipment anyway to cover replacement and/or repairs and put this money in a separate depr. acct. weekly. After 500 hours on a given piece of equipment I don’t care if the darn thing blows up and and I had to buy a new one but since it hasn’t I can buy other equipment or another machine for backup.
