Two specific recommendations:
http://www.tvfool.com/...for antenna requirements and direction. AntennaWeb is fine, too, but I prefer TVFool's formatting of the data. YMMV.
https://www.channelmaster.com/...for DVR and antenna. Their DVRs don't require a monthly subscription (excuse the $200 TiVo model), and their antennas are some of the better on the market.
Some additional thoughts:
Given distance and terrain, you'll probably need a good 30' elevation on an outdoor semi-directional antenna if your attic/roof isn't high enough. You will want connection boots/seals for the coax connectors to keep out corrosion and signal loss over time, and you will want proper grounding to earth and surge suppression (in fact, code and your insurance will require it - it'll basically be a lightening rod, after all). If everything major you're looking to tune in is within about 10-15° of each other, you probably don't need a directional motor. Those are mostly for very directional situations where only a yagi will suffice. If the spread exceeds about 15°, but still within about 90° of each other, you might be able to get away with 2-4 multi-directionals mounted together. A signal booster would probably be warranted, too.
There are some antennas from other manufacturers that'll mount on existing satellite dish posts, too, if that's an option. This means most of the hard work will already be done for you, like running cable and grounding, provided its high enough and mostly unobstructed in the direction you need. The only good ones I can think of at the moment (RCA), are more short-range omnis, though... which won't work for you.
It's also worth noting that some models of LG WebOS televisions include built-in DVR capability, just add USB drive. They also include built in streaming/on-demand channels from Xumo and an integrated TV guide for both OTA and live streaming with near seamless transition between them, on top of app support for most of the major free and pay streaming providers. But as with everything else like it from Roku to ChromeTV, etc., you're the product being bought and sold, not the customer... so be prepared to lose your privacy.
Lastly, ATSC3? Meh. I've seen the specs, and I know what it can do, the cost to entry point to visibly see any difference, and the ridiculous drive for higher and higher resolution and planned obsolescence. I've said it before, and I'll say it again... being able to see the hair grow out of Bob DeNero's mole doesn't make Heat a better film. Plus, the "safety" features of the spec is getting a little too doubleplus-good and painfully redundant in a smartphone saturated society. Hard pass. Just ride the current ATSC standard equipment until its retirement.
