I don't know about hugelkulture beyond what it is. I just wanted to comment on your lack of ability to bring in materials. I know that with hugelculture you add pockets of different materials but still require a decent "topping". My suggestion is aimed more at producing that topping than building hugelkultures. Of course, I have no idea how big your project is and if you visit the site often, but if you are building hugels in stages and you are there a lot, you could "manufacture" a cubic m of compost in around a month using the method demonstrated by Geoff Lawton and others. there are loads of youtube videos
and Geoff has a complete soil building video that is very interesting.
I have personally tried it and it does work! I had a site that was in a forest of blue gums far away from my house. I would accumulate a bucket of kitchen scraps (green matter) and take it whenever it was full. I'd alternate with sacks of horse manure (nitrogen and innoculants) I could carry up. I used the bluegum leaves and twigs (you could use pine needles) for carbon and build a 1 square meter pile, as the carbon needs to be around 80%, most of the material is onsite. Once I'd completed the pile-I built the first one over 2 weeks- I let it sit for 4 days before starting to turn. The first pile took about 5 weeks in total but I started building the next pile as soon as I had finished building the first. You very quickly end up with loads of piles! Now, I know (from experience) that turning loads of piles is a lot of work but I found that you could skip turnings -you get days when you just can't face it-which lengthened the process slightly. I am a not-so-young, slightly unfit woman and I regularly managed to turn a fluctuating total of up to 5 piles. Stacking functions really, as I improved my health and fitness levels! Adding pee or comfrey tea is also a great way of adding moisture and nitrogen and can be carried up in a 20L drum. I would advise adding the pee at the beginning to allow time and heat to sterilise.
Just an idea, each one's situation is different. maybe someone else has something else to offer?