I recommend renting the equipment you need to tell the story properly as opposed to spending tens of thousands of dollars buying new things which won't be as "good" as that which you can rent.
You'll probably need HMIs/Daylight Kinos/Photoflood practical bulbs as you're shooting a lot of daylight (and you can gel all those daylight fixtures without sacrificing too much of their output).
You'll need a camera/tripod/mattebox/monitor at least, and also may want a dolly or steadycam, jib etc depending on what types of camera motion you're into. Again, when you look at the prices for all of those things, you'll realize that rental is the most sensible/economic option and will hopefully leave some money left over for something vitally important and often over looked-- Production Design-- even as simple as a few cans of paint, can really build a location. Here's an example:
This was an all white basement... but a few panels from home depot and some sand bags really helped change it into a "dad's place" for our faux interview:
And another example, wherein we painted the whole hallway yellow (it was just white) added in an end table, and also decorated it, just for a quick interview shot (as well as a very long camera motion shot.. something like a 5 min hand held between 3 characters, which was.. well fun).
Now you also don't mention what you're doing on this piece, are you the sound recordist, the DoP, the director? Hire those to fill the roles you need with the experience and insight to help guide the project in terms of equipment selection. I'm a DoP, and I know enough about audio to get me by when I'm flying on my own, but when I need feature film quality audio, I recommend and deffer to a good friend of mine who I know knows the job, just as often when I'm DoP-ing the Director will deffer and ask me what will work when we get stuck (not to too my own horn too much), or I will deffer to a director for how he things it'll be best to block it or my colorist for how best to get a certain effect. Point being, when you're doing a bigger project, you get a bigger crew and one hopes you get a qualified crew (or at least one you can stand! I'd rather have people I get along with than someone who is necessarily uber-super at all they do) Ok rant over.
(edited for image placement)