Couple questions to ask yourself, can you handle being without the bike while issues are fixed? Can you afford to fix it when problems arise?
Building a 1441 will cost you the same or more as a turbo and make less power. Unless you have a bike scene nearby that you can race everyday with different people, everyone is going to know you have a built motor Busa and not race you anyway. If you are looking for the stock look then run a full exhaust on the turbo and keep the air cleaner within the plastic. Only someone really looking would see the turbo.
Reason I say that is I had a built 1397 which cost me about the same you’re thinking and I lost the entire motor when a single oil bolt backed out on a ride from NY. One bolt cost me everything. Yes it could have happened on a turbo build too, but with a NA build your hands touch every single bolt on the bike. I was constantly worried when riding that something was gonna break. The bike was amazingly fast. But it was a constant headache. Once adding power I found it broke the next weakest link. Then the next. If you can tolerate that, then go to town. If I had the opportunity to do it over I would go turbo without a second thought.
Going 1441 be prepared to make a second fan and switch for the fans as it will run hot. You have to run at least head studs. You’re gonna want to lower it, going to want some lighter rims, etc. It adds up. Without doing these things even with a 1441 you won’t compete with the latest liter bikes. Trust me. I just returned from down this road. Search for some of my threads.
Don’t get me wrong I’m not saying a built motor bike can’t be reliable. I’m just saying a turbo will be more reliable, more power, and easily upgraded if you choose. After you get used to the 1441 and want more then what? Spray? Yes good luck with that. Now it’s more unreliable.
Again, good luck whichever road you go down, but as someone who just drove it, turn at the turbo and never look back.