Look man, tablets and ipads are for p***sies. I had the ipad air, gave it to my 5 year old niece. Tablets are okay if you want to browse the web or do retarded social media crap. But if you really want to type or work, there is no replacement for a PC or laptop with a keyboard. At least, while typing, your fingers and brain know what they are up to.
Get a small laptop, like one of those 11 or 12 inch screens. Plenty of good models from HP/Toshiba/Sony. They will have decent enough processing and screen. Plus, without the DVD drive, and with SSD, they are very thin and light. Get a carrying case and you are all set.