I'm looking at getting a drone from Aliexpress to periodically look:

a) around the house's roof and also

b) inside the roof space

Apparently it's a good idea to check out the roof space annually e.g. for leaks etc. Roof space is fairly spacious (big enough to install ducted heatpump).

I've had a look at https://www.rsm.govt.nz/business-individuals/buying-electrical-and-electronic-products-in-new-zealand/buying-a-drone-or-remotely-piloted-aircraft-rpa/ and the model I'm looking at is supposed to use Remote Control Frequency: 2.4GHz and Smartphone Receiving method:5G WIFI Channel, so sounds ok.

So I've 2 questions:

1) any problems I should expect from importing a drone via Aliexpress (beyond the usual caveats about buying anything from Aliexpress)

2) will navigating the roof space be a problem?

Thanks!