Yes, seem. Because I don't know the whole process that goes into everything they do and without that it is hard for me to say it is or is not reasonable, thus I said it seems BS
I could say $15 is much for a hamburger but if I don't know what went into that hamburger then I could be talking out my ass.
You've never taken any college economics classes, have you?
"... I don't know what went into that hamburger ..."
That's not how the market works at all. Someone can charge $15 per burger to cover their actual costs of $10, including overhead and retail wages, and make $5 profit, or they can spend $7 to make each burger and make $8 profit.
All that matters is whether the customer -- you -- are willing and able to pay $15 for that burger. If you feel the need to analyze "what went into that hamburger" to make that decision, fine. Most people compare the burger itself -- taste, size, etc. -- to other burgers being offered for sale. The price is not a function of what the maker spent, but what value you see compared to other options.
$15 for a burger that's almost exactly like another at $10 is, based on end result, too much.
Carry that over to government services -- specifically gun permits and registrations. When compared to half the states that have Constitutional Carry, Hawaii is not providing anything extra to justify that "cost" to gun buyers/owners. Even their (your) rationale that the registry helps solve crimes doesn't hold water.
Nothing that is on a registration is unique to other sources of the same exact information. Watch a Cop or Courtroom show that uses real-life cases. You'll see how possession of unregistered firearms is easy enough to establish using FFL records from area stores, receipts from sporting goods stores for ammo, friends, family and coworkers who have seen you with a firearm, fingerprints on a recovered firearm or shell casing, etc. etc.
As of January 1, 2019, seven states and the District of Columbia required individuals to register their ownership of certain firearms with local law enforcement agencies. Is it your belief that 43 states which do not require firearm registration have no way of solving gun crimes?
So, to answer your question, it IS NOT reasonable for this state to place so many burdens on the gun-owning residents when so many others offer the same right and freedom without such bureaucracy.