We have done work like this before, and in our experience the cost of a tent tends to be more expensive than putting up a full-on chalet.
The chalet lends itself to a more elegant look – in addition, it is easier to upgrade in future depending on your needs. The top of the chalet can be made mosquito-proof, and the windows of the blinds can be clear plastic only, or have optional shade-net curtains that can also be rolled up.
As for a larger lapa, we can easily do the walls, which can roll up, giving an unobstructed view of the scenery. If you could send us rough measurements of the lapa walls you require, we could give you an estimate of the cost.