So basically 1 unit per month somewhat front loaded. I'd go talk to some dealers, give them the specs and have them put in bids.
Or at that rate, buying used is an option if you can find them but you need someone knowledgeable to check for problems before buying.
2 bedroom units will be big and pricey. You will also need ongoing maintenance. If the dealer is nearby, you might sweeten the deal if they also have a maintenance contract to do repairs, reseal and winterize.
Full hookups are good but leaving the tanks open is bad. Either you need to train the residents or look into park models that have no tanks. The downside is you must have sewer hookups and most aren't very mobile.
You are talking a million dollar deal with ongoing costs, might be worth hiring a mobile rv tech to act as your representative and inspector...don't expect new units to be trouble free.
