Some more remarks:
Quarantine is always necessary and home quarantine does not exist. It does 'exist' when someone bribes the official. On the quote of the agents they even state: for this item you will not get a receipt. That's also why the officials prefer you use an agent; they have a very lucrative agreement between them.
There are two major steps: obtaining an import permit and customs & quarantine clearance. The health certificate you need before obtaining the import permit, is not the same as the one within 5 days of the transport. The first one can be from a 'normal' vet (they have multi-language forms for that), the latter should be a more general one from the ministry in your country. Many countries don't have them and 'make them on the fly' (i.e. you tell them what to put in).
Rabies testing at laboratory in Europe is approx. 50 Euro per pet. The sending of the samples to the certified lab and receiving of the results is done by the vet and takes approx. 3 days. Only rabies is important btw; there is no legal requirement for any other test (but the vet would be incompetent if he provides a health certificate without vaccination records).
The Quarantine does not take good care of your animal. So do expect to go there to feed and groom them.
If airlines allow pets in the cabin, the normally have a maximum per flight (I wish that was the case for babies). In business class there are no pets allowed, in coach normally two for the whole cabin.
When arriving with pets, you might have to pay import duties.