Built 1 air cond 40 foot cabin and store inside. Ac on 24 hours.

i have job offer oversea, i foresee if i take up the offer, i will come back here once or twice a year, each visit last a week or two.

so, currently i have a fun weekend car that i love very much that i dont really want to sell it.

apart from selling it, what are my options in storing/maintaining the car in tiptop condition while im away from the country?

im not keen to handover to my friends and family, as there is a risk that they or their sons/daughter/friends might "accidentally" take/"lend" it for a joyride.