Hello, I would like feedback and critique on my latest homebrew spell: Conjure Boat. Please let me know what you think.

I actually think it would be better to, instead of giving access to each major boat type depending on level, it would be better to limit to a few major ship types. I also think it would be more fair to split it into two spells... I think a good comparison would be Tiny Hut compared to Magnificent Mansion. They both accomplish similar functions, but the difference in quality is so high that trying to combine the two is just a blatant attempt to minimize the number of spells you need to learn.

I think that Conjure Rowboat makes sense as a 3rd level spell, and allow it to be upcast to a Keelboat at level 5, but neither version of the spell produces crew, since presumably the party would be large enough to man boats of that size themselves. This is roughly the equivalent of having a Folding Boat, which is a Rare item, and I think that about equates to a 3rd level utility spell.

At 7th level you hit the same level as Magnificent Mansion, which produces a virtually impenetrable home that provides near-unlimited food and conjures 100 servants. I think that scales well to something like Conjure Warship, trading the safety for travel, swapping the food production for weapon production, and replacing the 100 general-use servants with 40 specialized crew mates. I wouldn't really bother with a Galley, since it's not particularly different from a Warship... just a couple more ballista and a larger deck. Although if a player is dead-set on having the largest possible ship and crew I suppose there's no harm in allowing them to upcast with an 8th level slot.

Also, I think the casting time should be higher for the second option I suggested. I was about to say it should be a minute for both, but actually I kind of like the idea of getting caught in a combat your PCs aren't ready for, and running for a nearby river or something and conjuring a rowboat for everyone to hop in and GTFO