I have been on a search for a new oven myself but have different requirements than you. Since you are on the east coast I would look at Grill'sNovens.com. They have modular kits as well as pre assembled. They have a new brick pre assembled oven made in Portugal that looks good. Also Belforno in Charlotte NC has modular kits and the shipping for both would be less for you on the east coast. Like you I know I cant afford a true VPN style oven. But for me, Im also not interested in one. I want much more versatility and don't mind a larger door, higher vault since I want to roast turkeys and smoke pork etc also. As for pizza I have been to Naples and had true Neapolitan pizza and jus got back from vegas where I had true VPN certified pizza several times at Settebello. As much as I love this style of pizza I find it to be boring after a while. To limited in ingredients and the taste profile is very tight. So for me I get why everyone strives for true VPN pizza here on this forum. I myself would only choose to make it occasionally. I would much prefer NY style ore Chicago style. Pan pizza like Pizzarium or just a great roasted chicken or some nice steaks made over the coals. But alas, this is a pizza forum.
My short list includes FGM from Antoine and Fogazzo made in Ca. I know FGM is a better oven , but it will cost me almost $2000 more. Los Angeles Ovenworks and Mugnaini are very similar and use the same supplier for their oven floors. LAOW had a great 20% off sale recently. Could make up for the shipping to the east coast. But most of these ovens are modular and not pre assembled. Not sure if you want to go that route.
Have you called any of these suppiers and chatted with them? This will give you a sense of what you can expect. I had terrible customer service from FB. That alone gave me pause as to doing business with them. Ive had great conversations with Breadstone, Fogazzo,Beforno, Ovens'ngrils, Los Angeles Ovenworks, and Earthsotne. I've called many more to get information and their response has been less than stellar. These are the vendors I would trust at this point. But please keep in mind I still have not purchased an oven yet. Im still looking so my advice should be taken with that in mind.
Good luck shopping.