Mold, Lead, Asbestos Testing Kits - recommended or seek a professional?
Seems reasonable to me.  IMO, if you are able to send samples to a lab, that is going to be more precise and certain than any kit you could apply in the field. 

The only thing I don't like about it is that it creates a third-party record, which means now you must engage any formalities of dealing with those things, and the formalities can be more annoying and expensive than the actual work.