Hi Lance,
Depending on the reef tank size and how much time it would take to initially set it up, then the amount of time you plan to spend maintaining it, the price you charge him/her is entirely up to the two of you to negotiate.
Set up the tank and all equipment/lighting/skimmer, etc
Sandbed, live rock, fill tank, etc.
Cycle the tank
Water tests
Mixing new saltwater
Water changes
Top offs
Water quality adjustments
Cleaning
General weekly maintenance
Extensive monthly maintenance
Will the vet do daily/weekly routines, or are you going to have to do everything - and he/she just feeds the fish ?
Things I would have to consider if I was going to "charge" someone to set up and maintain a remote tank.
How much time do I spend on my own tank.
Who supplies the freshwater ? On site RO or RO/DI ? or do I have to haul in water ?
Who buys the supplies ( not pays for it ) but goes out and buys the stuff to have on hand.
How far away from my house is this remote reef tank ?
What supplies will I need to furnish vs. what the owner is going to supply, such as test kits, saltmix, necessary on site maintenance equipment, etc.
What is my free time worth to me, and will taking care of a remote reef tank interfere with my own tanks and personal life.
I've never charged anyone for help - but I guess if I did, I would estimate my services at;
Initial tank set up if owner buys everything - $200.00 to $250.00 depending on size of tank and equipment.
Mixing the saltwater, getting it to temperature and salinity, laying down the sandbed, filling the tank, cycling with owner bought live rock - $100.00 to $200.00 depending on size of tank.
First few weeks during cycle, testing water and monitoring cycle - $20.00 / hour
Weekly maintenance - no less than $25.00 / hour
It all depends ..... is this vet's reef tank a 10 gallon nano or a 300 gallon monster reef ?