Trade your aging veterans - and bring in young prospects, with some value at a cost effective method.
Build your minor league system thru the draft, and develop them. Ensure you have you a good scout. Build a good pitching staff, and I know that will be a challenge with your budget. But you can build an effective staff thru trades, free agency, and the draft.
It will not be easy, I know I just took an expansion team in Major League Baseball after the 2016 season, we are not very good, but we will be