Basically you use your community facilities and bring in a coaching team who want to progress. Recruit local kids on amateur terms also with the prospect of progression. Those showing potential get to train with the first team squad, maybe inclusion on match days.
It's then a case of deciding whether to farm out on loan to a Lowland League side to progress or continue to provide game time at Under 20s level. It isn't a huge financial burden. You do need a committed coaching structure from top to bottom all working together.
*Apologies, I replied to the wrong post