The RTS Game I want to build

So i want to build an RTS game what does that look like  well here are some milestones and sub milestones. its likely i wont get passed 3 the milestones will progress in a way that Odd milestones will have implementations and even ones will have refinements
the Odd ones should be functional the even ones should be playable.

some milestones here are rather asset focused ill try source those from elsewhere. i think i may be able to reach 4 if i am lucky but intend to continue the development past the project time frame.

Milestone one: Singleton Mode

• One Unit
• One Unit producer
• One movement command
• One combat command
• One other unit action
• One building
• One resource
• Functional UI

Milestone Two: Gamifying

• add a win condition
• add a mini map
• Add terrain complexity
• add an animation
• add a sound
• make UI attractive
• add visuals for all the stuff i forgot
• create a static challenge to be overcome

Milestone three: Complexity

• add command queue.
• add basic unit AI.
• add additional movement commands (attack move, patrol, stop, Hold Ground).
• add production timers.
• add production queue.
• add a resource.
• add 2 units (3 total)
• add unit groups.
• add control groups

Milestone four: polished mini-game

• background music
• Unit sounds
• unit models if possible
• simple animation
• themed visuals
• improve player feedback
• icons
• terrain detail improvement

Milestone five: A full race.

• 2-3 more units.
• more buildings.
• tech restrictions/tree.
• unique actions.
• upgrades.
• statuses.
• race features

Milestone Six: Meta-game and polish.

• a menu prior to the game
• settings that effect the game
• save and load
• visual, audio and feedback polish

Milestone Seven: Networking.

• allow synchronized play for two players in one game over a local network
• (unity has tools for this may be actually plausible)

Milestone Eight: simple RTS

• the goal is a clear game with a early, mid and late game with a clear win condition that is simplistic but not poor.

MIlestone Nine: More

• additional units / races
• additional polish