Hey Lucrius,
It can be difficult to make money at low levels, but Structures is one of the most lucrative trader professions. You may want to create an alternate combat character on the same server as they make a lot more money at low levels.
If you haven't already aquired or crafted some harvesters, this is what you need to do first. Get those placed and pull up resources that you can use to level up.
Levelling up as a Structures Trader is VERY FAST if you have the resources, it can be done in a couple of hours, here's a guide on it:
Pawlins Guide to grinding Structures Trader You will need bout 188.75k steel, 1.9k aluminum, 477.6 ore, 163k water and 50k gems in total, so you need to harvest a lot!
What harvesters are you using at the moment? There are four levels of harvester.
Personal: Maximum Base Extraction Rate (how fast they harvest resources) of 5
Medium: Maximum BER of 11
Heavy: Maximum BER of 14
Elite: Maximum BER of 44
If you are using Personals Harvesters, be sure to harvest lots of ore and steel so that you can level up to Level 46 where you can make medium harvesters.
Do you have a Vendor yet? Have you stocked it with any items and is Vendor Search enabled? This allows players to browse your vendor from any bazaar terminal in the galaxy.
I hope that helps.