As I had mentioned before once you are involved there is no turning back. It is not cheap; firstly you must have a shop lot or a land in the case of if you want to build a stand alone.
The renovation of the farm would be around 20k -100k or more depend on what you want and how you want it to be done. This excludes the cost of the property.
Swiftlet farming is a long term investment. During this time there are hidden costs involved. Most would say that it is a one time investment and there is no other cost involved once the farm started operation. This is true when you strike jack-pot, means that there are no problems in your farm and as the time goes by you see improvement in terms of increasing of bird’s population and nests quantity.
What about if it is the opposite? Then rectification works have to be carried out to revive the farm. This could be a on going process sometimes it may take months or years to get to what you want.
The cost may vary from few hundred to ten of thousand. It depend how bad is the condition. Some may resort to making concrete slab on the roof to reduce the temp. In this case it would be costly. While the minor one would be some partitioning to reduce light, the later one would cost less. And all these depended on the condition of your farm.
Many would sit back and wait but if the initial design or structure that created an unfavorable micro then sitting back and wait would not help at all. So “Do it or loose your investment".
( making additional wall, concrete slab & new position of entrance)
So the most important when you want to get involved or start a Swiftlet farm make sure that the farm that you build is Swiftlet friendly. With this in mind you won't be resorting to many rectification works in future.