Getting a +1 like you do in eg. Bozzja alike content with the 1v1 fights wont work... other than everyone suddenly got the max +3 bonus to get a housing plot.

RNG is what it is... you put your money on a lottery ticket and got a chance to get picked by those others who did the same.

If you got no house and all you do is is to bid on medium and large you decrease your chances as many try those... if you want to increase your chance for a large or medium... get a cottage first.... once that is done... you can wait and see untill an hour or something before the lottery numbers is picked and see which house of your prefered destination has the least bets on them and try that.