I wouldn't plan on going over 3 minutes in content (right around 2 minutes is my sweet spot.) Real estate shoots are more 'all over the place' in pricing than anything else I've seen. I offer realty professionals discounts based on volume - especially with aerial stills only. Your market will dictate what your pricing can be. In my case, offering a rate of $175 per property for a single shoot, or offering additional discounts in volume of 5 or more properties grouped relatively close together. This cut down overhead in logistics with travel times, etc. Of course, this is flying a Phantom with post processing on 8-12 images per location. Phantoms work better in my market area because we're heavily wooded everywhere.
Video is completely property-dependent for me. An average sized home with interior/exterior video will bring about $450. Sometimes more, sometimes less, but there's no sandbagging here. The volume is the key and I've already knocked my competition out of the area with a higher quality deliverable at a slightly lower price (spoken by two of my clients.)
I've never needed a full day to shoot for these types of projects. Unless you have a third party controlling the timing, these site times can be done in 1-3 hours with good planning. Post is always where your time gets locked-up. I've done numerous pieces for social media promotions for $400-$1000 a shoot. I'd love to get $100/hour, but that rate simply will not fly here (no pun intended.) Some simply provide raw footage as a deliverable. All my work goes through post in-house.
Man, all I can tell you is get your foot in the door with your local media. They will market the hell out of you if you're feeding them amazing content. Once you've established your quality of work and flexibility, it's contract time. There are many more hidden opportunities behind the scenes where they will contract you to provide promotional shoots for their market clients that want the advantage of aerial footage in their pieces.