Big Night Sky,
- Insurance
- Hangarage
- Cleaning / washing
- Registration transfer (one off)
- 100 hourly / annual
Also, make sure you include any time life'd items in the fixed costs.
For example:
- paint
- hoses
- prop (factor it in if you don't intend to run it out of life before time...)
- radio / instrument checks
- corrosion checks (assuming it's not a new aircraft and someone, somewhere in the world finds a cracked spar on your model plane in the near to medium term)
- and there's more but I'm not on my PC with the uber spreadsheet.
Cheers,
Flog.