In a word - yes !
Unless you have an existing building you could convert ? or even a corner of it.
There are many, many people who's pigs farrow alone, outdoors and do fine - losses are to be expected in every case (inddors or out), but I feel with an indoor area where you can get up close to watch/assist there are fewer losses, (especially if it's winter - you can't get a heated creep into an arc very easily) and it's easier if you have to intervene. Unless you think you'd like to share an arc with a farrowing pig ? (I wouldn't lol!)
HTH
Karen