[Closed] LBTT and additional dwelling supplement in Scotland Oh my heed hurts

Looking at options for moving to the country (been watching Escape to the country too much). This is in Scotland.

Anyway first thought was buy land then build a house. Now if the land is under £145k I don’t pay LBTT but do I pay additional dwelling supplement if over £40k? I already own a house, which I will sell next year (I hope).

Next thought was buy a big house already built but LBTT gets massive when you go above £325k. So to avoid that buy a smaller house with a bit of land or buy a plot?

Either that or just have a smaller house. Problem is I also want to buy a holiday let as an income generator. So lots of LBTT tax and additional dwelling supplements will reduce the bike buying budget. First world problem I know. Any gems of wisdom from the collective?