I would recommend learning to set up a code editor (vs code for example, just install it), install stacks, and/or goose, confiure the LLM provider via API (pyperq for example) and then create a mkstack repository. There you can see and edit the code at the same time as the llm edits your application. About costs: I am alos struggling. Results with gemjni flash are very bad, with claude sknnet very expensive... But I guess that's how it is for the moment. Normally with nostr apps, the data is stored on blossom servers, so you don't need to set up a database. That's the whole point of nostr.