list of best things to make using the Roland BN-20

I am in year 1 of starting my printing company i started with the Roland BN-20 and would like to get some advise on what it can do and intern what i can offer i have mainly been doing window banners and Tee shirt printing so far i am looking to get a bigger and better Roland Printer soon but need to make the income for that out of the Roland BN-20 then i will upgrade can get one give me some tips of what to focus on making or what i should be looking to do with the R0land BN-20