classic group-RPG (isometric)

Hey.

- a complex RPG, with a playtime of at least 20 hours

- a group of up to 6 characters, with 1 main character [and more NPCs that can join the group]

- Sprites rendered from 3D objects, fully 3d rendered cutscenes (1920x1080)

[i can do these things, but I am worried about the size of the project]

- offline savegames

- food, sleeping, day and night circle

- free "roaming" groups of enemies, monsters.maybe with spawn spots.

- Battlefield fights (hexagonal battlefield)

- dialogue system with multichoice

- traders and inns

- character inventory, leveling

- fights with magic, guns - so, several fighting classes.

Seems to be better in RPG maker, right? But I have some experience with construct 2.

Do you think construct 3 is a good game engine for this?

Do you have experience with this, can you suggest templates?

I am especially worried about the dialogues and items [if I realy make many NPCs, it could become a huge mess]

What are downsides, when using construct 3 for this?

Construct 2 became confusing for me because the simplistic array system was too basic for a very complex item/dialogue/npc system.

I'd say everything you listed is possible, check out our game - 100% made in Construct 3.

looks nice. Will check later...!

RPGs are a very data-centric type of game. Depending on your experience, you may find it way better to move any abstract systems to scripting. But it's 100% possible (but managing data with EventSheets alone may become a pain).

managing data with EventSheets alone may become a pain

It's not that bad. The trick is to move from arrays to JSON. Once you get familiar with JSON, dealing with data in C3 becomes a lot easier.

JSON data storage - I heard about that too. I hope it is not too complicated, so that I am able to add new items, characters and dialogues even without a strong JSON knowledge. I will try to hire someone who creates me the stuff I listed.

I have some web-code experience but writing any code from scratch is beyond my possibilites.

It would be completly delusional to think I can do art AND code on my own. :D

JSON would hopefully still allow me to display a demo of the game (or, concept) as a web-application. For example, on newgrounds and here? So I can gather feedback asap.