Some changes have been made for the head start and official release. Basic terrain blocks are now free, advanced terrain block prices have been reduced, furniture block prices have been reduced, and you can now expand your house for free.
Pose's Housing Guide: Link
I would just like to add that you can unlock souvenirs that you can interact with in your house to give you buffs that last for an hour. Probably the most important buff is the Scion of Light, which gives 4% Piercing.
Maple Weeb's Housing Video:

Maple Weeb's Servants Video: