I told a few friends this would be a resolution this year. They didn't believe me for good reason. But, I haven't bought any fabric yet. I like your parameters because backing and borders aren't necessarily available in my stash. My only 'exception' is being part of a BOM club that includes the fabrics the shop includes with each BOM. It's a fun group and I'm torn about not being part of it for the 3rd year. When you buy your first BOM pattern & fabric, it costs $5. When you bring in the completed BOM the following month, your fabric & BOM are free. The only requirement each month to have free fabric (all coordinating for the finished project and this year it's batiks!), is to bring your completed BOM each meeting. Can that be permitted yet keep this resolution???
My friends know me....this allowance will make it much less difficult yet keep me satisfied.