It sounds a little bit like you just want a Nexus so you can have fun with it. This isn't critical to you developing the game, why would we buy you a nexus to play with?
I want a new monitor, does anyone want to buy me a new monitor?
Your artist might need a new computer? That sounds like it could be more critical to getting your game developed.
Ask yourself if you even need an artist at this stage? I thought for a long time that art was holding me back because I didn't have an artist but then I saw an early prototypes of Braid - be bascially made most of the game before he even thought about what it would look like, he did it all with stick figures and no animation.
Like I said before, try actually making the game, I think you'll realise that you don't need these things your after at such an early stage. When you've got some prototypes together - then you can show these and then properly break down any funding requirements you have.
Look at this https://www.youtube.com/watch?feature=player_embedded&v=uFvAMPsO-NA
This is a new game idea from the guy who made Love - it's all prototype art, everything is so simple - mechanically too - but it does a good job of showing off a core idea. If I saw this video on Kickstarter or whatever and he was like, look I have this idea - check it out - I need 5,000 to pay a freelance artist and sound designer to generate assets for me. I'd find that a much more reasonable proposition to your offer where it just sounds like you want a Tablet for no real beneficial reason to the development of your game at this stage.