maybe a week? maybe more?? maybe less??? idk...i cant run fast but im a decent archer, can easily win a sword fight and because i rarely leave my house znd have h9megrown vegetables...and pretty dsure i could make a water purifier thingy plus i live in a 4th floor in a residental area...i could just put barber wire on the fence, weld the gates shut, lock the building door, turn the stais into a slide (and hijack the elevator so that it doesnt work) and then lock my house door...hehe try getting through that >:)

basically id last until either the plants die, i run out of water (and it doesnt rain), the sword breaks or i run out of arrows (these last 2 in case they somehow managed to enter my house)

so yeah id probbly be slef suficent