I understand the daily driver and money struggle. If I was you I'd just save up your money, buy the whoosh v3 hi flow cat, then at least send that and your manifold out for coating (My guy had my stuff back to me within a week), then do your install. You'll still be able to daily your car while you wait for your items to be coated and you'll have a much better setup then a stock dp with your big turbo. I understand waiting sucks. I've had an s280 brand new in the box from whoosh for about 6 months now due too the curse of while I'm in there I may as well change this too🤣.
like you i am in full on "while i'm there" upgrade mode. and with the way inflation has gone i decided to pull the trigger on A LOT of things before inflation gets built into all parts i always wanted to put on the Fiesta.