Professional card (beroepskaart) is an authorization from authorities allowing to establish and manage company, and reside in Belgium for non-EU nationals. 
It depends on  the workload of the authorities and the period of the year, but in general, you can expect from 12 to 16 weeks once the dossier is sent.
Yes, it is possible to do from many countries. If you can apply for Belgian visas from your country, then you can apply for the professional card as well.
No, to work as employee your employer needs to request a work permit (arbeidskaart). Please check our respective web-site.
First of all, we have a continuous successful experience in obtaining professional cards. Using our experience and examples from previous successful dossiers will increase your chances of approval to maximum.
Low running costs of our company allow providing the best pricing. We guarantee!

Our fee depends on the services you requested. In general, we have the best pricing for professional card services in Belgium, because we focus only on professional cards and work permits, and can serve multiple clients in parallel. If you contact immigration lawyers, they usually don't provide fixed price and charge 200-250 EUR per hour VAT  excl. Also they don't have reusable templates for motivational letters and business plans.