Sa documentation, kailangan mo siguro ng 2 na magkaiba na ID... iyong sa mga car rental passport ata hinihingi na isa pa bukod sa driver's license. Yung agreement maganda siguro mag konsulta ka sa abogado para plantsado na kaagad kaysa magka problema tsaka lang susubukan ayosin. Make sure your liability for any damage caused by the driver gets minimized or otherwise sagot ni driver yung ibabayad mo... Standard checklist na rin para may documentation kayo ni driver kung ano iyong kondisyon ng sasakyan kapag turn over sa kaniya
Gadgets you will probably need some kind of GPS tracker, those usually need an active sim card as well. Not sure if mayroon ng remote immobilizer sa Piinas
Documentation you also have to be careful, baka mahabol ka for data privacy issues. This goes back to the contract. Best to have lawyer go through each section carefully