Jasp05, others will give you scope advice, I'll give you something different. Orion make a very nice
100mm tabletop dob and i can highly recommend you grab one to keep your daughter occupied while you are busy with your other scope. She can explore the sky as she sees fit with ease and its a very good scope. I use mine while my camera is clicking away and it gives amazing views.
DSLR astrophotography is my hobby and I mostly now stick to a 70-200 f2.8 lens and shoot off tripod. As you've found, its all about the processing to account for the capture limitations. Still there is much you can do with just a camera. (see my astrobin gallery in my signature link for some examples).
Looking forward I can see you building a good AP setup as time and funds allow. I can recommend step one is get yourself a good GOTO mount. Probably an EQ6 or EQ8 as no matter what scopes/cameras you buy if you have a poor tripod/mount your AP will always be limited. You could buy a GOTO EQ mount today, pick up a dovetail plate the attaches to your camera tripod mount so it can be attached to the EQ mount and you will be able to start taking 30sec exposures with ease and up to several minute exposures and that will step up drastically your AP capabilities, galaxies and nebulae. You can easily star align a GOTO mount using live view on your camera. I would suggest an EQ8 but others will offer their suggestions (I have a CGEM-DX, but can't use it at the moment). A mount capable of taking a heavy payload means no worries about performance with whatever size scope you want to put on it, but balancing the load does become critical especially for unguided subs, I've never used a guider but setting up all my gear and pointing it to the area of sky i intend to image and balancing it all in that position as precise as i could always gave me good tracking (nice round point stars) with my goto target dead center of shot even though i couldn't see the target in any single shot it was there once stacked. This is just with a camera/lens (looking pitifully tiny ) on the mount. I never got around to attaching my DSLR to my scope (an 11" SCT) but did use a ZWO cam for video capture of planets through it. Deep sky stuff I stuck to camera and lens pretty much. I didnt progress into filtered imaging for health reasons but thats where you should end up.