I see that you have a situation that I can relate to. I am still trying to figure out my plans for future fs development.
My name is Chris. I'm not even close to being a professional developer, but I have learned a few things. I'm currently working on (KDSM) Des Moines International Airport which is my home airport, and the (KIKV) Ankeny Regional Airport. I have been working alone on these projects for a few months, and I'm pretty happy with the results. I have always wanted to make high quality scenery like FlyTampa, FlightBeam, and FsDreamTeam.
I love blender!. I like blender because it's free, and is a great tool to apply textures to my models. I never was willing to pay the money for 3DSMax. I also like Sketchup. The reason I like Sketchup so much, is because of how easy and simple it is to use. Not only that but you can make a 3D models very fast because it's so simple. I feel that it doesn't have the high quality texturing capabilities that i'm looking for. I use Gimp for texturing which is free alternative to Photoshop.
Recently I made a hangar in Sketchup, and exported it as a .dae collada file, then opened the file in blender. One of the problems I had with importing into blender was that it created a bunch if unnecessary lines that I had to delete before I started to texture it. Then I made the textures for it in gimp. I usually export my project as a Collada file, then open it in Model Converter X. I never had problems with MCX import files from blender, but this time I did, because it came from Sketchup, and then Blender. I don't know why, but my textures would not load, but after a few days of tweaking, I fixed the problem. After that I used the Convert and place object wizard in MCX. It turned out okay, but in the future I might just stick to build buildings in blender and gimp alone. I would not recommend this method to just yet, because it has not worked for me perfectly yet. I have some other ideas that i'm testing.
I've been building my ground polygons with Sketchup, because it takes a lot of work for me in Blender. I might import it into Blender and texture it there.
Blender has an amazing feature the I use a lot, called ambient occlusion, it generates shadows and detail for your textures. I highly recommend using this feature as much as possible. If you want to know more about it, I recommend watching this YouTube video Austin has posted
he is a very talented guy, I love his channel. You might want to take a look at all his other videos as well.
Here's my first KDSM hangar completely made on blender.
As you can probably tell, I believe in free stuff, and sometimes you can find high quality free tools. I highly recommend Blender 3d for any future projects. As with all new modeling software it takes a bit to learn how to use. I suggest learning the basics of Blender on YouTube, or search the web, and at first you don't have to work on airport scenery, you can build your skills working on other projects as well. Before I started developing airports, I had already worked with blender for many years. After flying on flight simulators for awhile I decided to put both skills together.
I plan to make some tutorials in the future on my new YouTube channel
https://www.youtube.com/channel/UCTze_BTsk61uvKnbEjHxR8Q. I have also opened a space in my blog
http://pathtotheclouds.blogspot.com/ for tutorials. I congratulate you if you have read this far, and want to wish you luck with your developing situation. I've never heard of anything wrong with 3Ds max and if it were free, I'd grab it as soon as possible, but for now Blender has served me very well. The designers of blender are geniuses, and have really worked hard to give this freeware software, payware performance.
Happy Developing=)