The tablets are good but they are still delicate in terms of size.
On the iPad (that's what I use) edrawing is 1.79€ and the pro version 8.99€. a tablet from 380€ To store the files, either via the network or you use a navigation app for 12€, or via a wifi hard drive for 200€
Then there is the surface... Or you could install eDrawing at the first price of 339€, but there is a good chance that the PC application can only be installed on the Pro A ..... 779€
but it's still very small and the graphics cards are very limited.
a touch pc with an HD4000 type acer V5 c is in 15.6 touch it costs -500€ and I think it's much more practical.
The luxury the Lenovo 550€ tablet PC with a beautiful design (but not so great features) or the HP envy at 729€
I just discovered that Edrawing exists on Android! We've been waiting for it for a long time! The application has been available on iOS (Iphone, etc.) for several years.
It is available for €1.49 on the Official Play Store:
http://goo.gl/ugLkET
I'll probably test it next week at work.
For the choice of a tablet, I would recommend the Samsung Galaxy Tab 3 at 340 €: http://goo.gl/dLSPN8
Otherwise, a good low-cost tablet is the Cube U30GT2 at 185 €: http://goo.gl/07ACWp
I own the first U30GT of the name, and a friend has it (U30GT2) and he is very happy with it (we bought the 2 on this site, even if the name may seem dubious, it is reliable).
If you have any questions about Android or tablets, don't hesitate!
Finally, for the transfer of files between the PC and the tablet, many solutions exist: the simplest for me, when you are covered by wifi is AirDROID: http://goo.gl/RuctNc
Very simple, very practical and fast transfers, on the other hand I don't know if it works with a desktop PC connected to ethernet!
Or you can simply copy the files to a microSD card and then insert it into the tablet.
Avoid taking tablets with a 3G connection etc, it's very expensive and a bit useless for my taste!